arXiv:1008.1548 [quant-ph]AbstractReferencesReviewsResources
Emergence of coherence in the Mott--superfluid quench of the Bose-Hubbard model
Patrick Navez, Ralf Schützhold
Published 2010-08-09Version 1
We study the quench from the Mott to the superfluid phase in the Bose-Hubbard model and investigate the spatial-temporal growth of phase coherence, i.e., phase locking between initially uncorrelated sites. To this end, we establish a hierarchy of correlations via a controlled expansion into inverse powers of the coordination number $1/Z$. It turns out that the off-diagonal long-range order spreads with a constant propagation speed, forming local condensate patches, whereas the phase correlator follows a diffusion-like growth rate.
Comments: 4 pages
Categories: quant-ph, cond-mat.quant-gas
Keywords: bose-hubbard model, mott-superfluid quench, off-diagonal long-range order spreads, forming local condensate patches, superfluid phase
Tags: journal article
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